use Kdyby\Github\UI\LoginDialog;

class LoginPresenter extends BasePresenter
{

	/** @var \Kdyby\Github\Client */
	private $github;

	/** @var UsersModel */
	private $usersModel;

	/**
	 * You can use whatever way to inject the instance from DI Container,
	 * but let's just use constructor injection for simplicity.
	 *
	 * Class UsersModel is here only to show you how the process should work,
	 * you have to implement it yourself.
	 */
	public function __construct(\Kdyby\Github\Client $github, UsersModel $usersModel)
	{
		parent::__construct();
		$this->github = $github;
		$this->usersModel = $usersModel;
	}


	/** @return LoginDialog */
	protected function createComponentGithubLogin()
	{
		$dialog = new LoginDialog($this->github);

		$dialog->onResponse[] = function (LoginDialog $dialog) {
			$github = $dialog->getClient();

			if ( ! $github->getUser()) {
				$this->flashMessage("Sorry bro, github authentication failed.");
				return;
			}

			/**
			 * If we get here, it means that the user was recognized
			 * and we can call the Github API
			 */

			try {
				$me = $github->api('/user');

				if (!$existing = $this->usersModel->findByGithubId($github->getUser())) {
					/**
					 * Variable $me contains all the public information about the user
					 * including github id, name and email, if he allowed you to see it.
					 */
					$existing = $this->usersModel->registerFromGithub($me);
				}

				/**
				 * You should save the access token to database for later usage.
				 *
				 * You will need it when you'll want to call Github API,
				 * when the user is not logged in to your website,
				 * with the access token in his session.
				 */
				$this->usersModel->updateGithubAccessToken($github->getUser(), $github->getAccessToken());

				/**
				 * Nette\Security\User accepts not only textual credentials,
				 * but even an identity instance!
				 */
				$this->user->login(new \Nette\Security\Identity($existing->id, $existing->roles, $existing));

				/**
				 * You can celebrate now! The user is authenticated :)
				 */

			} catch (\Kdyby\Github\ApiException $e) {
				/**
				 * You might wanna know what happened, so let's log the exception.
				 *
				 * Rendering entire bluescreen is kind of slow task,
				 * so might wanna log only $e->getMessage(), it's up to you
				 */
				Debugger::log($e, 'github');
				$this->flashMessage("Sorry bro, github authentication failed hard.");
			}

			$this->redirect('this');
		};

		return $dialog;
	}

}

$openPullRequests = $github->api('/repos/octocat/Hello-World/pulls/1', array('state' => 'open'));

try {
	// ...
} catch (\Kdyby\Github\ApiException $e) {
	// ...
}